I have a 250 mL Nalgene bottle that I fill with a pool water sample, bring it inside and do the testing in there, except for CYA testing which has to be done in full sunlight. I also use a 3/4" ID, 4 foot length of PVC and my thumb to draw sample out of the pool from below the surface. Thumb covering the end, push underwater, remove thumb to allow water in the pipe, thumb back over the pipe, then pull the sample out and empty the pipe into the sample bottle. The 4 foot pipe holds plenty to fill the bottle. Hands and arms stay dry doing it that way, which is especially helpful when the pool is cold in the early spring and fall.